10x speed difference between two WD drives, same model, why?

Wd Caviar black 1tb 7200rpm sata 3gbps 3...
December 23, 2013 at 15:05:54
Specs: Windows 7, E8500/8GB
I have two WD1001FALS-00J7B1's. One transfers at over 500mb/s peak (~350mb/s continuous) and the other about 32mb/s on the same system. Different ports, cables do not matter results repeatable. Any thoughts? Obviously I like the xfer rate on the one drive.... And yes, to reiterate, it is repeatable.

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#1
December 23, 2013 at 15:10:14
Post the full model of your motherboard. Or if pre-configured OEM then post the full model of the computer.

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#2
December 23, 2013 at 15:31:39
yeah that would be helpful right? oops! Foxconn G41MXE, Intel E8500, 8GB Win7 Pro

http://www.foxconnchannel.com/Produ...


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#3
December 23, 2013 at 15:51:03
I also have a High Point Rocket Raid card installed, connecting through that card makes 0 difference for either hdd.

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Related Solutions

#4
December 23, 2013 at 23:38:40
Data fragmentation can affect read/write speeds compared to a drive whose data is not fragmented, so maybe you should check that.

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#5
December 24, 2013 at 07:41:10
Thanks, one thing I am trying to find out why the faster drive is operating at well over 100% of the rated 126mb/s

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#6
December 24, 2013 at 08:07:19
Are you using the PATA controller. What hard drive settings are you using in the BIOS?

Post the information listed for BOTH of those hard drives in Windows Disk Management.

Install HWMonitor from the link below and use it in real time to see if hard drive temperatures are detected and have similar numbers.

message edited by OtheHill


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#7
December 27, 2013 at 12:42:54
no real options in the bios other than pata before sata; I do not have any pata drives although there is an open connector on the board.

temps capping at 40c; for the two WD1001FALS-00J7B1 they are both steady at 37 and 40c
I am using the sata connections on the board OR the raid card it makes no difference what port it is connected to I still get 500+mb/sec for a few seconds and then it settles to about 350mb/s. A 12.5GB binary test file copies in about 30 seconds.


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#8
December 27, 2013 at 19:13:02
Did you run the hard drive tests from WD utility download?
You can try swapping out the circuit boards on the two drives to see if it is the board or the drive itself (tiny torx driver required).
Between these two tests, you can then contact Western Digital and see if they have any suggestions or will do something for you about the slower drive (but this may depend on how long you own them).

You have to be a little bit crazy to keep you from going insane.


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#9
December 28, 2013 at 13:58:51
I'm curious about the faster drive, is 350mb/sec normal? Waht speeds should I expect? WD rates them at about 126mb/s...

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